Alley cropping A cropping system where crops are grown in the inter spaces between rows of planted trees is called Alley cropping. It is a simple technique that restores nitrogen to the top layer of soil so that farmers can use the same piece of land year after year to grow their crops.

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2.

Which of the following is the leading producer of soybean in India? [A] Chhattisgarh [B] Madhya Pradesh [C] Maharashtra [D] Uttar Pradesh

Madhya Pradesh The leading producer of soybean in India is Madhya Pradesh, followed by Maharashtra and Rajasthan.

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3.

Climate of which of the following states in India is suitable for cultivation of cloves? [A] Kerala [B] Karnataka [C] Tamil Nadu [D] Uttar Pradesh

Kerala Farming of cloves is done in Kerela. Clove requires a warm humid tropical climate with an annual rainfall from 150-250 cm. It grows well from mean sea level up to an altitude of 800-900 m. Deep loam soils with high humus content and black loams of semi-forest regions with good drainage are suited for the cultivation of the crop.

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4.

Which of the following is the insectivorous fish used for mosquito control? [A] Hilsa [B] Labeo [C] Gambusia [D] Mystus

Gambusia Gambusia is a large genus of fish in family Poeciliidae. Gambusia species are also known as mosquito fish, which, refers more specifically to two species, G. Affinis and G. Holbrooki. These can be introduced into ponds to eat mosquito larvae. That’s why, Insectivorous fish used for mosquito control is Gambusia.

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5.

In human body, “Thrombin” plays important role in which of the following physiological processes? [A] Excretion [B] Blood clotting [C] Reproduction [D] Growth

Blood clotting Thrombin is a serine protease that in humans is encoded by the F2 gene. In the blood coagulation pathway, thrombin acts to convert factor XI to XIa, VIII to VIIIa, V to Va, and fibrinogen to fibrin.

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6.

Which of the following scientists of India is related to theory of Black hole? [A] C.V. Raman [B] H.J. Bhabha [C] S. Chandrashekhar [D] H. Khurana

S. Chandrashekhar In 1931, the astrophysicist Subrahmanyan Chandrasekhar theorised that a star would not form a stable white dwarf at the end of its life if its mass was greater than 1.44 times the solar mass (1.44 Ms). This is known as the Chandrasekhar limit, above which the white dwarf will explode as what is called a “Type 1a supernova”. This work fetched Chandrasekhar the Nobel Prize in 1983. His work led to current theory of Black Hole. A black hole is a region of space time from which gravity prevents anything, including light, from escaping. The hole is called “black” because it absorbs all the light that hits the horizon, reflecting nothing, just like a perfect black body in thermodynamics In 1931, Subrahmanyan Chandrasekhar calculated, using special relativity, that a non-rotating body of electron-degenerate matter above a certain limiting mass (now called the Chandrasekhar limit at 1.4 solar masses) has no stable solutions.

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7.

Which of the following refers to Secondary growth in plants? [A]Development of secondary organs after the plant attains maturity [B]Development of flowers and fruits [C]Growth in length and development of new branches after the plant starts flowering [D]Formation of secondary tissues by the activity of lateral meristems

Formation of secondary tissues by the activity of lateral meristems Growth in vascular plants resulting from the production of layers of secondary tissue by a lateral meristem (the cork cambium or the vascular cambium). The new tissue accumulates and results in thicker branches and stems. Secondary growth occurs in gymnosperms, most eudicots, and woody magnoliids (such as the magnolia). Most monocots and herbaceous plants undergo little or no secondary growth but simply stop growing when their primary tissues mature.

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8.

Pollination by which of the following will be called Entomophily? [A]Bats [B]Elephants [C]Butterflies [D]House Sparrow

Butterflies Pollination by insects is called entomophily. Entomophily is a form of plant pollination whereby pollen is distributed by insects, particularly bees, Lepidoptera (e.g. Butterflies and moths), flies and beetles.

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9.

The plants which flower only once in their lifetime are called? [A]Monocarpic [B]Monogamous [C]Monogenic [D]Monocots

Monocarpic Plants that flowers once in their lifetime are called MONOCARPIC plants.

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10.

Which of the following diseases is commonly found in areas where Maize is main diet? [A]Beri-Beri [B]Pellagra [C]Scurvy [D]Kwashiorkor

Pellagra Pellegra is commonly found in areas where Maize is main diet because it leads to vitamin B3 (Niacin) deficiency. The vitamin B3 is found in maize diet but this is in a form that cannot be absorbed.